The Effectiveness of Heterotrophic Bacteria Isolated from Dumai Marine Waters of Riau, Used as Antibacterial against Pathogens in Fish Culture

Heterotrophic bacteria have an important role as decomposer of organic compounds (mineralization) derived from industrial waste, decomposition of unconsumed feed, faecal, excretion of fish, and have the ability to inhibit the growth of pathogenic bacteria. We investigated the role of heterotrophic b...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-02, Vol.116 (1), p.12034
Main Authors: Feliatra, F, Nursyirwani, Tanjung, A, Adithiya, DS, Susanna, M, Lukystyowati, I
Format: Article
Language:English
Subjects:
16S rDNA sequence
Antagonism
Antiinfectives and antibacterials
Aquaculture
Bacteria
Decomposition
Deoxyribonucleic acid
DNA
Enterobacter cloacae
Estuaries
Fish
Fish culture
Heterotrophic bacteria
Homology
Industrial areas
Industrial wastes
marine waters
Mineralization
Nutrients
Organic compounds
pathogenic bacteria
Pathogens
rRNA 16S
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Summary:Heterotrophic bacteria have an important role as decomposer of organic compounds (mineralization) derived from industrial waste, decomposition of unconsumed feed, faecal, excretion of fish, and have the ability to inhibit the growth of pathogenic bacteria. We investigated the role of heterotrophic bacteria used as antibacterial against pathogens in fish culture.This research was conducted from January until March 2017. The phylogenitic of the isolated bacterial was determined by 16S rDNA sequences analysis. Antagonism test showed that the bacteria had the ability to inhibit the growth of pathogenic bacteria (Vibrio alginolyticus, Aeromonas hydrophila and Pseudomonas sp.) Three isolates (Dm5, Dm6 and Dm4) indicated high inhibition zones which were classified into strong category with the average from 10.5 to 11.8 mm toward V. alginolitycus. Other isolates were classified into medium and weak category. Based on DNA analysis of heterotrophic bacteria isolated from marine waters of industrial area and low salinity of estuarine waters twelve strains of bacteria were identified, and all had highest level of homology to Bacillus sp.,one isolates has similarity to Enterobacter cloacae, other isolates to Clostridium cetobutylicum. Most of isolated bacteria obtained from the waters of industrial area due to it received much of nutrients that very influenced the growth of bacteria.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/116/1/012034